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Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.
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Why is it important for scientists to review and repeat the work of other scientists? 1.a scientific theory must be tested three times before it is proven. 2.the scientific method only applies to repeated experiments. 3.an experiment may have had errors that the scientists didn't recognize. 4.the results of individual scientists may be influenced by bias. 5.an experiment must be performed twice before the data can be analyzed.
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If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?
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Chemistry, 23.06.2019 16:00
Aconversion factor is a ratio of equivalent values used to express the same units in different quantities
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An atom has 5 protons and 7 neutrons. what is its mass number?...
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